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Episode Details: A Promise to Helene
A Promise to Helene
Series: Dateline
Season: Season 29
Episode Number: 9
Air Date:
Duration: 43 min
When college student Helene Pruszynski is found murdered, her case remains cold for nearly 40 years until a new detective uses an innovative method to catch the killer. Josh Mankiewicz reports.
Streaming Platforms for Dateline
